The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 8, 2026

Continental IO-520 series

9,484 aircraft on the U.S. register carry a Continental IO-520 series engine, rated at about 285 horsepower. The Beechcraft V35 Bonanza is the model most often fitted with it (1,496 aircraft). The aircraft carrying it were built between 1963 and 2017.

The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as Continental IO-520 series. FAA spelling: IO 520 SERIES.

When the aircraft were built by decade

By decade built, as a table
aircraft
194012
195037
19602,627
19704,534
19801,114
1990189
20005
20102

What the FAA has certified, ordered and been told about the Continental IO-520 series the component layer

The design is held under 1 type certificate (E5CE, held by Continental Aerospace Technologies, INC.). The FAA has issued 30 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 465 failure reports with the FAA since 1995, 26 of them in the last ten years.

FAA orders 30 airworthiness directives · newest first

2023-10-262023-17-04 · Reciprocating Engine Oil System · engine
2023-03-152023-05-16 · Reciprocating Engine Power Section · engine
2023-02-232023-04-08 · Reciprocating Engine Power Section · engine
2023-02-172023-02-12 · Engine Air Intake System · engine
2022-08-152022-16-03 · Engine (RECIPROCATING) · engine
2022-03-292022-04-04 · Reciprocating Engine Oil System · engine

All orders naming the Continental IO-520 series

Failure reports 465 since · what operators and shops told the FAA

016314662950005101520224
Failure reports by year, as a table
reports
9515
962
971
981
995
0037
0148
0258
0346
0435
0562
0617
0718
0817
0910
1020
1115
1213
139
1410
1512
164
172
181
192
202
221
242

Parts most often reported as the reports name them

Cylinder26Cylinder Head25Relay20Hub14Circuit Breaker13Antenna12Line12Bolt10Bracket9Control Cable9
Parts most reported, as a table
reports
Cylinder26
Cylinder Head25
Relay20
Hub14
Circuit Breaker13
Antenna12
Line12
Bolt10
Bracket9
Control Cable9

Latest reports

2024-04-06Engine: power loss
2024-04-06Engine: power loss
2022-01-21None: none
2020-07-10Rod: broken
2020-01-15Turnbuckle: corroded

Certificates and bulletins

E5CEType certificate held by Continental Aerospace Technologies, INC. · 18 models listed · revised March 8, 2022

Safety bulletins 11 · advice, not orders

2020-04-06NE-20-05 · POWERPLANT - Engine Camshaft Gear Tooth Fracture
2018-06-20NE-18-16 · POWERPLANT Alternator Drive Coupling
2017-05-10NE-17-11 · POWERPLANT Engine damage as a result of kickback
2016-03-08NE-16-13 · Powerplant - Prohibited use of sealant
2013-02-08NE-13-15 · Engine Controls: Continental Motors, Inc. (CMI) Throttle and Mixture Control Levers

Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.

Connections how this engine series links to the rest of the register

Fitted to
Where they are
Biggest operators
Airworthiness

The whole map of how records connect · these connections as data: /graph/engine/continental-io-520-series.json.

Aircraft newest certificates first · 9,484

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N111ZW Beech
A36
Fixed-wing, single engine Individual owner
Alabama
Standard 2018-10-27 ValidFAA registration status code V: Valid registration. All codes
N42WK Beech
S35
Fixed-wing, single engine Individual owner
Indiana
Standard 2018-10-25 ValidFAA registration status code V: Valid registration. All codes
N4702Q Cessna
185E
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2018-10-25 ValidFAA registration status code V: Valid registration. All codes
N6696Y Beech
A36
Fixed-wing, single engine Alcri INC
Lewes, Delaware
Standard 2018-10-25 ValidFAA registration status code V: Valid registration. All codes
N246CC Cessna
U206G
Fixed-wing, single engine Alaska Department of Public Safety
Anchorage, Alaska
Standard 2018-10-24 ValidFAA registration status code V: Valid registration. All codes
N7375N Cessna
U206G
Fixed-wing, single engine Ellison Air INC
Anchorage, Alaska
Restricted 2018-10-24 ValidFAA registration status code V: Valid registration. All codes
N28012 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2018-10-22 ValidFAA registration status code V: Valid registration. All codes
N6330K Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2018-10-22 ValidFAA registration status code V: Valid registration. All codes
N7195N Beech
V35A
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2018-10-22 ValidFAA registration status code V: Valid registration. All codes
N8359N Beech
V35A
Fixed-wing, single engine Hendricks Flying Service LLC
Imperial, Nebraska
Standard 2018-10-22 ValidFAA registration status code V: Valid registration. All codes
N9200Q Beech
F33A
Fixed-wing, single engine Co-owned owner
Texas
Standard 2018-10-18 ValidFAA registration status code V: Valid registration. All codes
N93623 Bellanca
17-30A
Fixed-wing, single engine Individual owner
California
Standard 2018-10-18 ValidFAA registration status code V: Valid registration. All codes
N254CM Cessna
310R
Fixed-wing, multi-engine Co-owned owner
Georgia
Standard 2018-10-17 ValidFAA registration status code V: Valid registration. All codes
N3181W Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2018-10-16 ValidFAA registration status code V: Valid registration. All codes
N5736V Beech
V35
Fixed-wing, single engine Co-owned owner
Florida
Standard 2018-10-16 ValidFAA registration status code V: Valid registration. All codes
N8822J Bellanca
17-30A
Fixed-wing, single engine Individual owner
Florida
Standard 2018-10-16 ValidFAA registration status code V: Valid registration. All codes
N39879 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Arkansas
Standard 2018-10-09 ValidFAA registration status code V: Valid registration. All codes
N5894S Beech
S35
Fixed-wing, single engine V Tail Therapy LLC
Seattle, Washington
Standard 2018-10-09 ValidFAA registration status code V: Valid registration. All codes
N5796J Cessna
210K
Fixed-wing, single engine Withheld at owner's request
Standard 2018-10-05 ValidFAA registration status code V: Valid registration. All codes
N185VE Cessna
A185F
Fixed-wing, single engine Xit Concrete INC
Dalhart, Texas
Standard 2018-10-04 ValidFAA registration status code V: Valid registration. All codes
N61522 Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-10-04 ValidFAA registration status code V: Valid registration. All codes
N185HJ Cessna
A185F
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2018-10-03 ValidFAA registration status code V: Valid registration. All codes
N191JH Beech
A36
Fixed-wing, single engine Jack Henry and Associates INC
Monett, Missouri
Standard 2018-10-03 ValidFAA registration status code V: Valid registration. All codes
N311BG Beech
V35B
Fixed-wing, single engine Bluffton Flying Service LTD
Bluffton, Ohio
Standard 2018-10-03 ValidFAA registration status code V: Valid registration. All codes
N6309X Beech
A36
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2018-10-03 ValidFAA registration status code V: Valid registration. All codes
N8867R Bellanca
17-30
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2018-10-03 ValidFAA registration status code V: Valid registration. All codes
N4493S Beech
V35B
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2018-10-02 ValidFAA registration status code V: Valid registration. All codes
N854P Beech
F33A
Fixed-wing, single engine Withheld at owner's request
Standard 2018-10-02 ValidFAA registration status code V: Valid registration. All codes
N55CG Cessna
210D
Fixed-wing, single engine Individual owner
Colorado
Standard 2018-10-01 ValidFAA registration status code V: Valid registration. All codes
N8157V Cessna
A188
Fixed-wing, single engine Ready Aim Flyer LLC
New Castle, Delaware
Multiple 2018-10-01 ValidFAA registration status code V: Valid registration. All codes
N600AF Beech
A36
Fixed-wing, single engine Clark Development LLC
Dekalb, Illinois
Standard 2018-09-28 ValidFAA registration status code V: Valid registration. All codes
N8452N Beech
V35A
Fixed-wing, single engine Individual owner
Oregon
Standard 2018-09-27 ValidFAA registration status code V: Valid registration. All codes
N4039B Bellanca
17-30A
Fixed-wing, single engine Parish Aviation LLC
Earth, Texas
Standard 2018-09-25 ValidFAA registration status code V: Valid registration. All codes
N185TP Cessna
A185E
Fixed-wing, single engine Individual owner
Idaho
Standard 2018-09-24 ValidFAA registration status code V: Valid registration. All codes
N2262T Cessna
A185E
Fixed-wing, single engine Individual owner
District of Columbia
Standard 2018-09-24 ValidFAA registration status code V: Valid registration. All codes
N345U Beech
A36
Fixed-wing, single engine Withheld at owner's request
Standard 2018-09-24 ValidFAA registration status code V: Valid registration. All codes
N4673S Beech
A36
Fixed-wing, single engine Gear Up Aviation LLC
Yukon, Oklahoma
Standard 2018-09-24 ValidFAA registration status code V: Valid registration. All codes
N5230U Cessna
206
Fixed-wing, single engine Individual owner
California
Standard 2018-09-24 ValidFAA registration status code V: Valid registration. All codes
N964S Beech
S35
Fixed-wing, single engine Individual owner
Missouri
Standard 2018-09-24 ValidFAA registration status code V: Valid registration. All codes
N88PB Cessna
207A
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-09-21 ValidFAA registration status code V: Valid registration. All codes
N47TC Cessna
210L
Fixed-wing, single engine Wright Frank David
Sequin, Texas
Standard 2018-09-20 ValidFAA registration status code V: Valid registration. All codes
N66VV Beech
V35
Fixed-wing, single engine Individual owner
Florida
Standard 2018-09-19 ValidFAA registration status code V: Valid registration. All codes
N767JC Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2018-09-19 ValidFAA registration status code V: Valid registration. All codes
N228C Beech
F33A
Fixed-wing, single engine Cutter Southwest Aircraft Sales LLC
Phoenix, Arizona
Standard 2018-09-18 ValidFAA registration status code V: Valid registration. All codes
N5649K Beech
S35
Fixed-wing, single engine Ryan Good Aviation LLC
Sioux Falls, South Dakota
Standard 2018-09-18 ValidFAA registration status code V: Valid registration. All codes
N1750W Beech
V35B
Fixed-wing, single engine Individual owner
New York
Standard 2018-09-15 ValidFAA registration status code V: Valid registration. All codes
N370R Cessna
U206G
Fixed-wing, single engine American Aircraft Management LLC
Irving, Texas
Standard 2018-09-15 ValidFAA registration status code V: Valid registration. All codes
N732GP Cessna
210L
Fixed-wing, single engine Gulf Pop Aviation
Saint Augustine, Florida
Standard 2018-09-15 ValidFAA registration status code V: Valid registration. All codes
N8702Z Cessna
A185F
Fixed-wing, single engine Sutton Aircraft Salvage LLC
Palmer, Alaska
Standard 2018-09-15 ValidFAA registration status code V: Valid registration. All codes
N777FW Cessna
210L
Fixed-wing, single engine Individual owner
Oregon
Standard 2018-09-13 ValidFAA registration status code V: Valid registration. All codes
N35MT Beech
V35
Fixed-wing, single engine Individual owner
Texas
Standard 2018-09-12 ValidFAA registration status code V: Valid registration. All codes
N3MD Beech
S35
Fixed-wing, single engine Individual owner
Texas
Standard 2018-09-11 ValidFAA registration status code V: Valid registration. All codes
N9629G Cessna
A188B
Fixed-wing, single engine Individual owner
Texas
Restricted 2018-09-11 ValidFAA registration status code V: Valid registration. All codes
N9703J Cessna
A188B
Fixed-wing, single engine Individual owner
Texas
Restricted 2018-09-11 ValidFAA registration status code V: Valid registration. All codes
N58GK Beech
58
Fixed-wing, multi-engine Mvm LLC
Lewes, Delaware
Standard 2018-09-10 ValidFAA registration status code V: Valid registration. All codes
N1361V Cessna
U206F
Fixed-wing, single engine Individual owner
Washington
Standard 2018-09-08 ValidFAA registration status code V: Valid registration. All codes
N165DF Cessna
A185E
Fixed-wing, single engine Individual owner
New York
Standard 2018-09-08 ValidFAA registration status code V: Valid registration. All codes
N185FD Cessna
A185F
Fixed-wing, single engine Desert Dog Aviation LLC
Salt Lake City, Utah
Standard 2018-09-08 ValidFAA registration status code V: Valid registration. All codes
N6979L Cessna
310K
Fixed-wing, multi-engine Individual owner
Missouri
Standard 2018-09-08 ValidFAA registration status code V: Valid registration. All codes
N8491Q Cessna
U206F
Fixed-wing, single engine Dry Bay Holdings LLC
Yakutat, Alaska
Standard 2018-09-08 ValidFAA registration status code V: Valid registration. All codes
N2008W Beech
V35
Fixed-wing, single engine Siamese Cat LLC
Issaquah, Washington
Standard 2018-09-06 ValidFAA registration status code V: Valid registration. All codes
N711PR Beech
A36
Fixed-wing, single engine Individual owner
Florida
Standard 2018-09-06 ValidFAA registration status code V: Valid registration. All codes
N9158M Cessna
U206E
Fixed-wing, single engine Co-owned owner
Washington
Standard 2018-09-06 ValidFAA registration status code V: Valid registration. All codes
N5829F Cessna
210G
Fixed-wing, single engine Individual owner
Washington
Standard 2018-09-05 ValidFAA registration status code V: Valid registration. All codes
N756BB Cessna
U206G
Fixed-wing, single engine Co-owned owner
California
Standard 2018-09-04 ValidFAA registration status code V: Valid registration. All codes
N97RG Beech
95-B55 (T42A)
Fixed-wing, multi-engine Army Aviation Heritage Foundation
Hampton, Georgia
Standard 2018-09-04 ValidFAA registration status code V: Valid registration. All codes
N4150S Beech
F33A
Fixed-wing, single engine Individual owner
Kansas
Standard 2018-08-31 ValidFAA registration status code V: Valid registration. All codes
N4157B Bellanca
17-30A
Fixed-wing, single engine Individual owner
Florida
Standard 2018-08-31 ValidFAA registration status code V: Valid registration. All codes
N18DR Beech
A36
Fixed-wing, single engine Individual owner
Georgia
Standard 2018-08-30 ValidFAA registration status code V: Valid registration. All codes
N1842W Beech
F33A
Fixed-wing, single engine Northwoods Aviation
Marion, Iowa
Standard 2018-08-29 ValidFAA registration status code V: Valid registration. All codes
N185WA Cessna
A185F
Fixed-wing, single engine Everel Floatplane LLC
Sandia Park, New Mexico
Standard 2018-08-29 ValidFAA registration status code V: Valid registration. All codes
N21KK Beech
A36
Fixed-wing, single engine Life'S A Beech LLC
Gulf Breeze, Florida
Standard 2018-08-28 ValidFAA registration status code V: Valid registration. All codes
N4173B Bellanca
17-30A
Fixed-wing, single engine Individual owner
California
Standard 2018-08-28 ValidFAA registration status code V: Valid registration. All codes
N4815J Beech
35-C33A
Fixed-wing, single engine Hackbarth Communications LLC
Reedsburg, Wisconsin
Standard 2018-08-28 ValidFAA registration status code V: Valid registration. All codes
N6261K Beech
A36
Fixed-wing, single engine Glasmon INC
Nacogdoches, Texas
Standard 2018-08-28 ValidFAA registration status code V: Valid registration. All codes
N756EJ Cessna
U206G
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-08-28 ValidFAA registration status code V: Valid registration. All codes
N300CL Beech
V35A
Fixed-wing, single engine Individual owner
Texas
Standard 2018-08-25 ValidFAA registration status code V: Valid registration. All codes
N303KC Beech
F33A
Fixed-wing, single engine Individual owner
Tennessee
Standard 2018-08-25 ValidFAA registration status code V: Valid registration. All codes
N6345Z Cessna
U206G
Fixed-wing, single engine Aerial Transport LLC
Dover, Delaware
Standard 2018-08-25 ValidFAA registration status code V: Valid registration. All codes
N811CW Beech
58
Fixed-wing, multi-engine J & H Aviation LLC
Lumpkin, Georgia
Standard 2018-08-25 ValidFAA registration status code V: Valid registration. All codes
N185SP Cessna
A185F
Fixed-wing, single engine Altschuler Elmer e
Soldotna, Alaska
Standard 2018-08-24 ValidFAA registration status code V: Valid registration. All codes
N6029F Beech
S35
Fixed-wing, single engine Co-owned owner
Texas
Standard 2018-08-24 ValidFAA registration status code V: Valid registration. All codes
N8011Z Cessna
U206
Fixed-wing, single engine Jackson Jet Center
Boise, Idaho
Standard 2018-08-24 ValidFAA registration status code V: Valid registration. All codes
N5405U Beech
V35
Fixed-wing, single engine Ryan Good Aviation LLC
Sioux Falls, South Dakota
Standard 2018-08-23 ValidFAA registration status code V: Valid registration. All codes
N761AM Cessna
210M
Fixed-wing, single engine Good Enuf LLC
Wilmington, Delaware
Standard 2018-08-22 ValidFAA registration status code V: Valid registration. All codes
N1947M Beech
S35
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-08-18 ValidFAA registration status code V: Valid registration. All codes
N413WG Beech
A36
Fixed-wing, single engine Havana Farms Equipment
Gilliam, Louisiana
Standard 2018-08-18 ValidFAA registration status code V: Valid registration. All codes
N29068 Cessna
U206C
Fixed-wing, single engine Jd Flying LLC
Bellingham, Washington
Standard 2018-08-16 ValidFAA registration status code V: Valid registration. All codes
N5251U Cessna
206
Fixed-wing, single engine David Vanderpol Construction CO
Harrison, South Dakota
Standard 2018-08-15 ValidFAA registration status code V: Valid registration. All codes
N2216U Cessna
U206F
Fixed-wing, single engine Withheld at owner's request
Standard 2018-08-14 ValidFAA registration status code V: Valid registration. All codes
N75CL Beech
58
Fixed-wing, multi-engine Clear LLC
Pierre, South Dakota
Standard 2018-08-14 ValidFAA registration status code V: Valid registration. All codes
N1548W Beech
V35B
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-08-13 ValidFAA registration status code V: Valid registration. All codes
N333LJ Beech
V35A
Fixed-wing, single engine Individual owner
North Carolina
Standard 2018-08-09 ValidFAA registration status code V: Valid registration. All codes
N5930F Cessna
210G
Fixed-wing, single engine Cable Strong Aircraft Holdings LLC
Tyler, Texas
Restricted 2018-08-09 ValidFAA registration status code V: Valid registration. All codes
N3096W Beech
F33A
Fixed-wing, single engine Co-owned owner
Texas
Standard 2018-08-08 ValidFAA registration status code V: Valid registration. All codes
N4562F Cessna
A185E
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-08-08 ValidFAA registration status code V: Valid registration. All codes
N4312W Beech
V35B
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2018-08-07 ValidFAA registration status code V: Valid registration. All codes
N6255H Cessna
207A
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-08-06 ValidFAA registration status code V: Valid registration. All codes
N2394F Cessna
210E
Fixed-wing, single engine N2394 Fox LLC
Sapulpa, Oklahoma
Standard 2018-08-03 ValidFAA registration status code V: Valid registration. All codes
N8788U Cessna
172F
Fixed-wing, single engine Individual owner
Texas
Standard 2018-08-03 ValidFAA registration status code V: Valid registration. All codes
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Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 8, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.